OT 50/120…277/1A2 2DIMLT2 P

Product family benefits
  • 2DIM functionality in one device (AstroDIM, 0…10 V)
  • High surge protection: up to 6 kV (in protection class I or II)
  • Fast programming without mains voltage
  • High efficiency
  • Great flexibility due to wide operating temperature range of -40…55 °C
  • Protection through double isolation between mains input and LED output
  • IP rating: IP64
Areas of application
  • Street and urban lighting
  • Industry
  • Suitable for luminaires of protection classes I and II
Equipment / Accessories
  • OT Programmer hardware for configuration of 2DIM ECGs necessary
  • Programmable via Tuner4TRONIC software
German innovation awards 2019 winner

Technical Data

Electrical data

Nominal voltage

120…277 V

Input voltage AC

108…305 V

Permitted voltage range

Nominal current

0.26 A

At 230 V/0.50 A for 120 VAC

Mains frequency

50…60 Hz

Power factor λ


Minimum/Full load at 230 V/Half load at 230 V

Total harmonic distortion

15 %

Max. output power at 230 VAC

Device power loss

9.6 W


Inrush current

30 A

twidth = 250 µs (measured at 50 % Ipeak)

Max. ECG no. on circuit breaker 10 A (B)


Type B

Max. ECG no. on circuit breaker 16 A (B)


Type B

Max. ECG no. on circuit breaker 25 A (B)


Type B

Surge capability (L/N-Ground)

6 kV

EQUI @ 12 Ohm acc. to EN 61547

Surge capability (L-N)

6 kV

@ 2 Ohm, acc. to EN61547

Nominal output power

50 W

Partial load 12…50 W

Maximum output power

50 W

Efficiency in full-load

86 %

at 230 V, 50 Hz

Nominal output current

600…1250 mA

Output current LEDset open

50 mA

Output current LEDset shorted

180 mA

Default output current

1000 mA

Output current tolerance

±5 %

Within nominal output current range

Output ripple current (100 Hz)

30 %

Output PSTLM


Output SVM


Minimum output current

180 mA

Galvanic isolation


Max. no. of ECGs on 16A MCB with EBN-OS


Nominal output voltage

20…55 V

U-OUT (working voltage)

60 V

Dimensions & weight


168.0 mm


50.0 mm


30.0 mm

Mounting hole spacing, length

152.0 mm

Mounting hole spacing, width


Product weight

490.00 g

Wire preparation length, input side

10 mm

Cable/wire length, control input

280 mm

± 20 mm

Cable/wire length, output side

280 mm

± 20 mm

Cable/wire length, input side

300 mm

± 20 mm

Temperatures & operating conditions

Ambient temperature range

-40…+55 °C

Ta(max) = 50 °C for input voltage 120/277 VAC

Temperature range at storage

-25…80 °C

Maximum temperature at tc test point

80 °C

Maximum at the Tc-point

Max.housing temperature in case of fault

120 °C

Permitted rel. humidity during operation

5…85 %

Non condensing, absolute humidity: 36g/m³


ECG lifetime

80000 h

At Tcase = 70°C at Tc point / 10% failure rate

ECG ambient temperature (ta)

55 °C

45 °C

40 °C

Temperature at the measuring point tc (°C)

80 °C

70 °C

65 °C

ECG lifespan (h)

50000 h

Max. 10% failure rate at tc max and input voltage 230 VAC

80000 h

Max. 10% failure rate at tc max and input voltage 230 VAC

100000 h

Max. 10% failure rate at tc max and input voltage 230 VAC

Additional product data

Product remark

No on/off switching of lamps possible via 0...10 V interface




Dimming interface

2DIM / 1…10 V / AstroDIM

Dimming range

30…100 %

Suitable for fixtures with prot. class

I / II

Constant lumen function


Short-circuit protection


No-load proof


Intended for no-load operation


Max. cable length to lamp/LED module

10 m

Output wires must be routed as close as possible to each other

Number of channels


Cable/wire types, output side

AWG 18, solid

Acc. to 1452 style

Cable/wire types, input side

AWG 18, solid

Acc. to 1452 style

Cable/wire types, control input

AWG 18, solid

Acc. to 1452 style

Overload protection

Automatic reversible


Programming device

OT Programmer

Certificates & standards

Type of protection



Acc. to EN 61347-1/Acc. to EN 61347-2-13/Acc. to EN 62384/Acc. to EN 55015:2006 + A1:2007 + A2:2009/Acc. to EN 61547/Acc. to FCC 47 part 15 class A/Acc. to IEC 61000-3-2/Acc. to IEC 61000-3-3/UL-8750

Approval marks – approval

CE / ENEC 15 / UR / CQC

Logistical data

Commodity code


Environmental information

Information according Art. 33 of EU Regulation (EC) 1907/2006 (REACh)

Date of Declaration


Primary Article Identifier

4052899173804 | 4050732453854

Candidate List Substance 1


CAS No. of substance 1


Safe Use Instruction

The identification of the Candidate List substance is sufficient to allow safe use of the article.

Declaration No. in SCIP database


Packaging information




Dimension l x w x h



4052899173804 UNV


1 168mm x 50mm x 30mm 490.00g 0.25dm³
4052899173811 VS

Shipping box

20 368mm x 338mm x 85mm 10492.00g 10.57dm³


Accessories optional

Information about Family

0-10V controllable LED driver family incl. AstroDIM functionality

The AstroDIM for autonomous dimming offers five independent levels (astro, time mode) and an isolated 0…10 V interface supports unidirectional telemanagement systems. Another benefit of this driver is the fast programming without mains voltage as well as an IP ration of IP64.
Product family features
  • Available with different wattage: 50 W, 100 W, 110 W
  • Input voltage: 120…277 V
  • Available with output current range: up to 1,400 mA
  • Flexible current setting with one additional wire (LEDset2)
  • AstroDIM for autonomous dimming with five independent levels (astro mode)
  • Isolated 0…10 V interface for unidirectional telemanagement systems
  • Constant Lumen Output (CLO)
  • Overtemperature protection with external NTC or LEDset2 interface
Ecodesign regulation information:
Intended for use with LED modules.
The forward voltage of the LED light source shall be within the defined operating window of the control gear in all operating conditions including dimming if applicable.

Separate control gear and light sources must be disposed of at certified disposal companies in accordance with Directive 2012/19/EU (WEEE) in the EU and with Waste Electrical and Electronic Equipment (WEEE) Regulations 2013 in the UK. For this purpose, collection points for recycling centres and take-back systems (CRSO) are available from retailers or private disposal companies, which accept separate control gear and light sources free of charge. In this way, raw materials are conserved and materials are recycled.


Sort by:
Nominal output current
Data sheet
OT 50/120…277/800 2DIMLT2 P
350…800 mA 168.0 mm 50.0 mm 30.0 mm
OT 50/120…277/1A2 2DIMLT2 P
600…1250 mA 168.0 mm 50.0 mm 30.0 mm
OT 100/120…277/800 2DIMLT2 P
350…800 mA 168.0 mm 68.0 mm 38.0 mm
OT 110/120…277/1A4 2DIMLT2 P
600…1400 mA 168.0 mm 68.0 mm 38.0 mm